APOSTOLOS N. PAPADOPOULOS 

Assistant Professor

"It is through science that we prove, but through intuition that we discover." (Henri Poincaré) 
[CV] [Publications] [Citations] [Courses & Diploma Theses] [Scala and Spark Seminar]
IntroI was born in Eleftheroupolis (also known as Pravi), a small town near Kavala city. I obtained my 5year diploma from the Department of Computer Engineering and Informatics, University of Patras, Greece and my PhD from the Department of Informatics, Aristotle University of Thessaloniki, Greece. Since 2009, I am an Assistant Professor with the Department of Informatics of Aristotle University. According to Google Scholar my hindex is 24 and according to American Mathematical Society my Erdős number is 3. Research InterestsMy current research interests span the fields of DATABASES and DATA MINING. In particular, I am interested in efficient query processing techniques in database systems (multidimensional data management, spatiotemporal data management), algorithms for mining graphs (dense subgraph discovery, frequent subgraphs, hidden graphs, probabilistic graphs), parallel and distributed techniques for massive data sets using Spark and Hadoop, and data management and mining over data streams. Tutorials
Core Decomposition in Graphs: concepts, algorithms and applications, to be presented in
EDBT/ICDT Joint Conference 2016, Bordeaux, France, March 2016 (with Fragkiskos Malliaros and Michalis Vazirgiannis).
Core Decomposition: algorithms and applications, presented in IEEE/ACM International Conference on Social Network
Analysis and Mining (ASONAM), Paris, France, August 2015 (with Fragkiskos Malliaros and Michalis Vazirgiannis). 
Awards"MetricBased Topk Dominating Queries", Proceedings of the 17th International Conference on Extending Database Technology (EDBT), Athens, Greece, 2014: selected for publication in ACM Transactions on Database Systems.
"SkyGraph: an algorithm for inportant subgraph discovery in relational graphs",
Proceedings of ECML/PKDD, Antwerp, Belgium, 2008:
received the Best Knowledge Discovery Paper Award.

Selected PublicationsE. Tiakas, G. Valkanas, A.N. Papadopoulos, Y. Manolopoulos, D. Gunopulos: "Processing Topk Dominating Queries in Metric Spaces", ACM Transactions on Database Systems (TODS), [best papers from EDBT 2014], 2015 (accepted). G. S. Brodal, A. Kaporis, A. N. Papadopoulos, S. Sioutas, K. Tsakalidis, K. Tsichlas: "Dynamic 3sided Planar Range Queries with Expected Doubly Logarithmic Time", Theoretical Computer Science (TCS), 526, pp.5874, 2014. E. Tiakas, G. Valkanas, A. N. Papadopoulos, Y. Manolopoulos, D. Gunopoulos: "MetricBased Topk Dominating Queries", Proceedings of the 17th International Conference on Extending Database Technology (EDBT), Athens, Greece, 2014. A. Kosmatopoulos, K. Tsichlas, A. N. Papadopoulos: "Dynamic Processing of Dominating Queries with Performance Guarantees", Proceedings of the 17th International Conference on Database Theory (ICDT), Athens, Greece, 2014. E. Valari, A. N. Papadopoulos: "Continuous Similarity Computation over Streaming Graphs", Proceedings of the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD), Prague, Czech Republic, 2013. D. Georgiadis, M. Kontaki, A. Gounaris, A. N. Papadopoulos, K. Tsichlas, Y. Manolopoulos: "Continuous Outlier Detection in Data Streams: an Extensible Framework and StateoftheArt Algorithms", Proceedings of the ACM SIGMOD International Conference on Management of Data, [demo track], New York, NY, USA, 2013. G. Valkanas, A. N. Papadopoulos, D. Gunopoulos: "SkyDiver: A Framework for Skyline Diversification", Proceedings of the 16th International Conference on Extending Database Technology (EDBT), Genoa, Italy, 2013. M. Kontaki, A. N. Papadopoulos, Y. Manolopoulos: "Continuous Topk Dominating Queries", IEEE Transactions on Knowledge and Data Engineering (TKDE), 24(5), pp.840853, 2012. E. Tiakas, A. N. Papadopoulos, Y. Manolopoulos: "Progressive Processing of Subspace Dominating Queries", The VLDB Journal, 20(6), pp.921948, 2011. M. Kontaki, A. Gounaris, A. N. Papadopoulos, K. Tsichlas, Y. Manolopoulos: "Continuous Monitoring of DistanceBased Outliers over Data Streams", Proceedings of the 27th IEEE International Conference on Data Engineering (ICDE), pp.135146, Hannover, Germany, 2011. A. Lyritsis, A. N. Papadopoulos, Y. Manolopoulos: "TAGs: Scalable ThresholdBased Algorithms for Proximity Computation in Graphs", Proceedings of the 14th International Conference on Extending Database Technology (EDBT), pp.295306, Uppsala, Sweden, 2011. 
PhD SupervisingOngoingPanagiotis Strouthopoulos is working on "Big Data Management and Analytics"Apostolos Lyritsis is working on "Topkbased Graph Mining Algorithms" Elena Valari is working on "Query Processing and Mining over Streaming Graphs" Georgia Latsiou is working on "Graph Mining in Probabilistic Graphs" GraduatedEleftherios Tiakas completed his thesis on "Similarity and Preference Queries in Multidimensional Spaces" 
